Resubmissions
25/01/2024, 01:57
240125-cdn9qadge6 1024/01/2024, 15:56
240124-tdhwdadfb5 1024/01/2024, 11:55
240124-n3eblahecn 10Analysis
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max time kernel
448s -
max time network
450s -
platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system -
submitted
24/01/2024, 11:55
Behavioral task
behavioral1
Sample
cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe
Resource
win10v2004-20231222-en
General
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Target
cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe
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Size
3.4MB
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MD5
f64a5c6fa180acaee93d4fac406c579b
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SHA1
bacf88f16fe670ef2d87df154929c51b28b12263
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SHA256
cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6
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SHA512
01687ae73126dd6540308efa140e56c5410d5971415881a3747cf961c4abcd2e9be4dcd75181f865070bfb4e296617b8e3d61f55de747407a4c459e6a2bc0197
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SSDEEP
24576:SvFnlgEsJu/SqXF3mh8uNFr95+CUNHEes4pyQquVexXCP7OigudxcAGZLqrDIjHM:QloJ0wtfSHO43ZpTLiADL
Malware Config
Extracted
C:\Users\Admin\Documents\PLS_READ_ME.txt
https://pastebin.com/raw/wZnisRDV
Signatures
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Chaos
Ransomware family first seen in June 2021.
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Chaos Ransomware 4 IoCs
resource yara_rule behavioral2/memory/4176-0-0x0000000000B40000-0x0000000000EAA000-memory.dmp family_chaos behavioral2/files/0x000500000000071d-6.dat family_chaos behavioral2/files/0x000500000000071d-13.dat family_chaos behavioral2/files/0x000500000000071d-11.dat family_chaos -
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
pid Process 364 bcdedit.exe 4808 bcdedit.exe -
Renames multiple (198) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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pid Process 4832 wbadmin.exe -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation svchost.exe Key value queried \REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe -
Drops startup file 3 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PLS_READ_ME.txt svchost.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.url svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 1676 svchost.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Drops desktop.ini file(s) 34 IoCs
description ioc Process File opened for modification C:\Users\Public\Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\OneDrive\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-3803511929-1339359695-2191195476-1000\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\Camera Roll\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessibility\desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\desktop.ini svchost.exe File opened for modification C:\Users\Public\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\Saved Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\AccountPictures\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\System Tools\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Searches\desktop.ini svchost.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\4qs9puhij.jpg" svchost.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Checks SCSI registry key(s) 3 TTPs 4 IoCs
SCSI information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\FriendlyName vds.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CDROM&VEN_DADY&PROD_DADY_DVD-ROM\4&215468A5&0&010000 vds.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_DADY&Prod_DADY_DVD-ROM\4&215468a5&0&010000\FriendlyName vds.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\DISK&VEN_DADY&PROD_HARDDISK\4&215468A5&0&000000 vds.exe -
Interacts with shadow copies 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 3808 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000_Classes\Local Settings svchost.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 4132 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 1676 svchost.exe -
Suspicious behavior: EnumeratesProcesses 50 IoCs
pid Process 4176 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 4176 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 4176 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 4176 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 4176 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 4176 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 4176 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 4176 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 4176 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 4176 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 4176 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 4176 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 4176 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 4176 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 4176 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 4176 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 4176 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 4176 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 4176 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 4176 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 4176 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 4176 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 4176 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 4176 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 1676 svchost.exe 1676 svchost.exe 1676 svchost.exe 1676 svchost.exe 1676 svchost.exe 1676 svchost.exe 1676 svchost.exe 1676 svchost.exe 1676 svchost.exe 1676 svchost.exe 1676 svchost.exe 1676 svchost.exe 1676 svchost.exe 1676 svchost.exe 1676 svchost.exe 1676 svchost.exe 1676 svchost.exe 1676 svchost.exe 1676 svchost.exe 1676 svchost.exe 1676 svchost.exe 1676 svchost.exe 1676 svchost.exe 1676 svchost.exe 1676 svchost.exe 1676 svchost.exe -
Suspicious use of AdjustPrivilegeToken 50 IoCs
description pid Process Token: SeDebugPrivilege 4176 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe Token: SeDebugPrivilege 1676 svchost.exe Token: SeBackupPrivilege 1084 vssvc.exe Token: SeRestorePrivilege 1084 vssvc.exe Token: SeAuditPrivilege 1084 vssvc.exe Token: SeIncreaseQuotaPrivilege 4260 WMIC.exe Token: SeSecurityPrivilege 4260 WMIC.exe Token: SeTakeOwnershipPrivilege 4260 WMIC.exe Token: SeLoadDriverPrivilege 4260 WMIC.exe Token: SeSystemProfilePrivilege 4260 WMIC.exe Token: SeSystemtimePrivilege 4260 WMIC.exe Token: SeProfSingleProcessPrivilege 4260 WMIC.exe Token: SeIncBasePriorityPrivilege 4260 WMIC.exe Token: SeCreatePagefilePrivilege 4260 WMIC.exe Token: SeBackupPrivilege 4260 WMIC.exe Token: SeRestorePrivilege 4260 WMIC.exe Token: SeShutdownPrivilege 4260 WMIC.exe Token: SeDebugPrivilege 4260 WMIC.exe Token: SeSystemEnvironmentPrivilege 4260 WMIC.exe Token: SeRemoteShutdownPrivilege 4260 WMIC.exe Token: SeUndockPrivilege 4260 WMIC.exe Token: SeManageVolumePrivilege 4260 WMIC.exe Token: 33 4260 WMIC.exe Token: 34 4260 WMIC.exe Token: 35 4260 WMIC.exe Token: 36 4260 WMIC.exe Token: SeIncreaseQuotaPrivilege 4260 WMIC.exe Token: SeSecurityPrivilege 4260 WMIC.exe Token: SeTakeOwnershipPrivilege 4260 WMIC.exe Token: SeLoadDriverPrivilege 4260 WMIC.exe Token: SeSystemProfilePrivilege 4260 WMIC.exe Token: SeSystemtimePrivilege 4260 WMIC.exe Token: SeProfSingleProcessPrivilege 4260 WMIC.exe Token: SeIncBasePriorityPrivilege 4260 WMIC.exe Token: SeCreatePagefilePrivilege 4260 WMIC.exe Token: SeBackupPrivilege 4260 WMIC.exe Token: SeRestorePrivilege 4260 WMIC.exe Token: SeShutdownPrivilege 4260 WMIC.exe Token: SeDebugPrivilege 4260 WMIC.exe Token: SeSystemEnvironmentPrivilege 4260 WMIC.exe Token: SeRemoteShutdownPrivilege 4260 WMIC.exe Token: SeUndockPrivilege 4260 WMIC.exe Token: SeManageVolumePrivilege 4260 WMIC.exe Token: 33 4260 WMIC.exe Token: 34 4260 WMIC.exe Token: 35 4260 WMIC.exe Token: 36 4260 WMIC.exe Token: SeBackupPrivilege 800 wbengine.exe Token: SeRestorePrivilege 800 wbengine.exe Token: SeSecurityPrivilege 800 wbengine.exe -
Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 4176 wrote to memory of 1676 4176 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 93 PID 4176 wrote to memory of 1676 4176 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 93 PID 1676 wrote to memory of 3064 1676 svchost.exe 99 PID 1676 wrote to memory of 3064 1676 svchost.exe 99 PID 3064 wrote to memory of 3808 3064 cmd.exe 101 PID 3064 wrote to memory of 3808 3064 cmd.exe 101 PID 3064 wrote to memory of 4260 3064 cmd.exe 103 PID 3064 wrote to memory of 4260 3064 cmd.exe 103 PID 1676 wrote to memory of 4916 1676 svchost.exe 105 PID 1676 wrote to memory of 4916 1676 svchost.exe 105 PID 4916 wrote to memory of 4808 4916 cmd.exe 111 PID 4916 wrote to memory of 4808 4916 cmd.exe 111 PID 4916 wrote to memory of 364 4916 cmd.exe 106 PID 4916 wrote to memory of 364 4916 cmd.exe 106 PID 1676 wrote to memory of 856 1676 svchost.exe 108 PID 1676 wrote to memory of 856 1676 svchost.exe 108 PID 856 wrote to memory of 4832 856 cmd.exe 109 PID 856 wrote to memory of 4832 856 cmd.exe 109 PID 1676 wrote to memory of 4132 1676 svchost.exe 114 PID 1676 wrote to memory of 4132 1676 svchost.exe 114 -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
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Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
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C:\Users\Admin\AppData\Local\Temp\cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe"C:\Users\Admin\AppData\Local\Temp\cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4176 -
C:\Users\Admin\AppData\Roaming\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.exe"2⤵
- Checks computer location settings
- Drops startup file
- Executes dropped EXE
- Drops desktop.ini file(s)
- Sets desktop wallpaper using registry
- Modifies registry class
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1676 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:3064 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:3808
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:4260
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no3⤵
- Suspicious use of WriteProcessMemory
PID:4916 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:364
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C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:4808
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:856 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:4832
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\PLS_READ_ME.txt3⤵
- Opens file in notepad (likely ransom note)
PID:4132
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1084
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:800
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Checks SCSI registry key(s)
PID:976
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:2424
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
1.0MB
MD5a582054723bf9c7b844a8ab8ae1454c8
SHA1a4ca7c0c25c1799e8b3f0e1db26437ba28e15f72
SHA256d4420fb90e992c52adc8b050c5f61932c3f26b076b6b3d4055301eeb8704e7c3
SHA512bb7a9fbc66c8cc1119913a880fc989087c4605a510e5e4aee2452345cf4785c4d3a90c83659e4ded473da8c5190b0504f59664d004e59b1b61694052ef1ee3dc
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Filesize
937KB
MD5dff9cedb9bb9e9c85c83bc282c361491
SHA1857b247439f996f0a4a41efc974b12890d143c8d
SHA25678917a3a48183b6947653f0eb8154c79bfec095f1e65bc248a6d7f7cc81fd393
SHA512ee7bcf7afd804298dbcbf430625b1e1119e54c2d63922d60099e8ec882a5f73325322674ee16c5402210477443ff9c69b88d2b939971f461a14127a2d0d0b92f
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Filesize
1.0MB
MD520b6132e4a65d22fb223db761abcd60b
SHA12317a4b155e003dcc024a5f3ceb33f720a90debb
SHA256237dd06f62a8c5c6eda3611aa5bcd70f2eb04c30b0581c05a5f36ec929e4724f
SHA5125837f850956e2a376a915dd1bbda4d8ff31ff6852c850209657cf5a2e6ae6de9dfd4ece07a6028a3019684c893eca69a60a8837a168d2bee8bb5da281ed6aa7c
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Filesize
1019B
MD5bf4f42180e1f6f0dc0dc8e5863fbfdff
SHA111ebaf5dd9d926371b27c9cdb86a0b7978deb383
SHA256c22510ba329236dacd2e14be4c260eca7a8deb7433cb4291311232f37ee40bd7
SHA5126004b7d2e6a6b4035363d25cb7291dc0be0c0070a8bbadea0c4275278fb4299e3348cb5aebb5d9870ff7986bf43c59983bb3aa1680f1b27fcad8c68064c09c16